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Use Object Types and Collections
The Collection types and object types increase your efficiency by allowing for the realistic data modeling. The Complex real-world entities and relationships map directly into the object types. A well-constructed object model can improve the application performance by eliminating the table joins, decreasing the round trips, and the same.
The Client programs, involving the PL/SQL programs, can declare the objects and collections, and pass them as parameters, store them in the database, recover them, and so on. Also, by encapsulating the operations with data, the object types move data-maintenance code out of the SQL scripts and PL/SQL blocks into methods.
The Objects and collections are well-organized to store and retrieve as they can be manipulated as an entire. The object support is also integrated architecturally with the database; therefore it can take benefit of the many scalability and performance improvements built into Oracle8i.
Exceptions An exception is the runtime error or warning condition that can be predefined or user-defined. The Predefined exceptions are raised implicitly through runtime system
Recursion versus Iteration Dissimilar the iteration, recursion is not crucial to PL/SQL programming. Any problem which can be solved using recursion can be solving using the it
This task involves developing some functions that extract data from an SQL database. The scenario is that a company which owns an online vehicle search website wants to generate so
UTL_FILE: The Package UTL_FILE permits your PL/SQL programs to read & write operating system (OS) text files. It gives a restricted version of the standard OS stream file I/O,
Using EXTEND To enlarge the size of a collection, use EXTEND. This process has 3 forms. The EXTEND appends one null element to a collection. And the EXTEND(n) appends n null e
What are 3 good practices of modeling and/or implementing data warehouses?
EXCEPTION_INIT Pragma The pragma EXCEPTION_INIT relates an exception name with an Oracle error number. Which allow you to refer to any internal exception by the name and to wri
Recursive Subprograms The recursive subprogram is the one that calls itself. Think of a recursive call as a call to a few other subprograms that does the similar task as your
Cursors The Oracle uses work areas to execute the SQL statements and to store process information. A PL/SQL construct known as the cursor. Let's you assume name a work area and
Advantages of Exceptions Using the exceptions for the error handling has many benefits. Without an exception handling, every time you issue a command, you should ensure for th
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